Electric stove



May 15, 1928. 1,669,802

c. c. ARMSTRONG ELECTRIC STOVE Filed Aug. 3. 1925 15 Sheets-Sheet 1 'InaenZ'ar:

Charles C Armsl'nazy, p %MM Ali-638.

ELECTRIC STOVE Filed Aug. 5. 1925 15 Sheets-Sheet 2 llll\i l i flir1r1fl. ll .IIII'ILJI l l l l l l l l l l l U l 1 Inventor:

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1 669 802 c. c. ARMSTRONG ELECTRIC STOVE Filed Aug. s, 1925 15 SheetsSheet 5 May 15, 1928.

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May 15, 1928.

Charles C Arilwmr y,

C. ARMSTRONG ELECTRIC s'rov Filed Aug. 3. 1925 15 heets-$heet 5 y 0 3. n m m I M m M am I C a s u k W w, N 3 m \QN NM 4/ $3 @M Xw m m 80M mm m 0 N3 0% s. mm mm M! l ll QQN w R May 15, 1928.

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Filed Ana. 3, 1925 May 15, 1928. 1,669,802

c. c. ARMSTRONG ELIICTRIC STOVE Filed Aug. 5. 1925 15 Sheets-Sheet 7 lhuenl'or:

Charles C.Arm.s:iv:ong fol [a a/ 4 :4

May 15, 1928.

C. C. ARMSTRONG ELECTRIC STOVE Filed Au. 3, 1925 15 Caneets-$heet 8 l nwzni'or:

Charles C. Armaj/m {Z zyawgww W May 15, 1928.

15-Sheets-Sheet 9 c. c. ARMSTRONG ELECTRIC STOVE Filed Auz. 3. 1925 Iii/9'13.

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C. C. ARMSTRONG ELECTRIC STOVE Filed Auz. 3, 1925 15 Sheets-Sheet l0 Inventor.-

Charzles C. Arr/2451530139,

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May 15, 1928. 1,669,802

c. c. ARMSTRONG ELECTRIC STOVE Filed Aug. 5. 1925 15 Sheets-Sheet 12 Invenimv Ch cu le ClArmlz'ong, w

ZM /Q/M. (a/W Atlys.

May 15, 1928. 1,669,802

c. c. ARMSTRONG ELECTRIC STOVE Fi A zs. 1925 15 Sheets-Sheet 1:5

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100 01a /dz I Q): Inueni'or: Charles G. Armsl'mn q,

May 15, 1928. 1,669,802- C. C. ARMSTRONG ELECTRIC STOVE Filed Auz. 3. 1925 15 sh et -sheet 15 fnuenior:

PAS/A l I I Cha lies ClArmefiyon Patented May 15, 1928.

UNITED STATES CHARLES C. ARMSTRONG, OF HUNTINGTON, WEST VIRGINIA.

ELECTRIC STOVE.

Application filed August 3, 1925.

The invention concerns .thcgeneral construction of the, stove and special features and details of constructionand organization in connection with the main features. The stove ;i s of parallelepipedon or box like form and contains within its limits all of the cooking appliances provided in stoves built along the general line of a gas range, but insteadof being provided with a platform at a point-01f laterally to one side of the oven in which platforn'i the burners are located, in my organization the platform in which burners arepositionecl surmounts the oven so that no more space laterally is necessary forlthe. occupancy of .th,e,- stove than thatwhich is required to accommodate the main body portion in which the oven is lo cated, permitting better heat insulating means and inconnection with the cover, ease in cleaning and servicing. I The stove besides having four heating elements or burners in its top which represent the capacity'of the ordinary gas'stove and of certainother forms of electric stoves and besides having an oven is provided with a toasting appliance and. also with provision forthe use of a wafile iron, the top Surfaces of the front elements being usable as griddles or hot plates.

The invention consists of the features and combination and arrangement of parts hereinafter described and particularly pointed out in the claims.

In the accompanying drawing Figure 1 is a perspective view of one form of the stove looking from the front and left side. I

Fig. 2 is a view of the stove of Fig. 1 looking from the right side.

Fig. 3 is a front view.

Fig. 4 is a side view looking from the left.

Fig. 5 is a vertical transverse section through the stove in a plane near the front thereof at the point where the wattle iron at tachmentand the toasting attachment. is cated, with certain parts shown in elevation.

Fig. 5 is a plan view of part of the top of the main body.

Fig-6 is acentral vertical section from front to rear of the stove with certain parts shown in side elevation.

Fig. 6* is a detail view of a horizontal section through the body. door and oven.

Figs. 6", 6? and 6 are details. I

. a- 75 grammati T e-v ett-lie elee Serial No. 47,830.

trical connections. switches, and t'he cloek and thern'iostat appliances.

Fig. 8 is a plan viewof one of the heating elements for the oven.

Fig. 9 is asideelevation of Fig-8.

Fig. 10 is afront viewof aQportion of-the heating element of Fig. 8. I

Fig. 11 isa detail relating to the heating element of Fig. 8.

Fig. 12 is a view of ing units. 1 Fig..13 is a 'plan viewof the heating unit ofFig. 12.. I I 5 Figs. 13?, 13" and l3 1are .-details of. Figs. 12andl3.- X

Fig. 14 is a view of one ofthe rear heatingunits- Figs. l f and 14" are details ofFig-M. 'Fig. l5'is a horizontalsection through a portion of the oven door, .with the thermostatic circuit-control -means. I

Fig.,161is a face view of parts of Fig. 15.

Fig. 17 is a view of the shaft of the thermostat. Fig. 18 shows .views of thejmercury tube holder. I

Fig. 19 is a view of-an indicator.

Fig.20 is a-detaiLj I Fig. 21 is aview of the thermostat coil. Fig. 22 is a detail.- I f v Y Fig. 23 is a View of a'time control element. Fig. 2{1 is aseotio'nal view of the time control mechanism. I I v Fig. 25 is a rear view thereof. I

Fig. 26 shows details of the mercury tube holder relating to .the time control means.

Fig. 27 shows the supporting bracket for the stove. I

Figs. 27, 27 and 27. and 27 are details of Fig. 27.

Fig. 28 is a side.;elevation of another form of stove and the manner of supporting the same to be moved intoand out of a recess in the wall of the-room.

Fig. 29 is a front' view of the store of Fig. 28.

Figs. 30 and 31 are sectional views showing details I The oven has full automatic control, thatis to say,.it will start ,up automatically ata time which may beset, by the cook or housekeeper, by the-clock attachment on the stove, and will regulate the temperature to the degree of heatdesi-red to cook fast or slow as t e 9 9. desire and twill' l t h of the front heatcurrent at the prescribed time to stop the cooking, this being; don automatically and accordingto the setting of the control by the cook.

The main body 1 of the stove is made up of sheet metal, of one piece, stamped to the substantially rectangular form shown in Figs. 5 and (3.

It has but one joint as shown at 2, which may be completed by welding or in any suitable way. 'The top' portion of this main body is countersunk as at 3' to providea slightly depressed top plate for receiving certain of the heating'elementsdo be supported thereby and for supporting also a it may be swung up to expose the upper heat ing units or elements indicated geliera'lly at 10, 10 11, 11 located within the chamber or compartment formed between the said cover 4 and the top plate or portion of the main body 1. The'cover' plate has openings as at 12, Fig. 5 through which the" heating elements are exposed on which utensils are placed to be heated.

There are four of these openings-in the form of the invention chosen for illustration. and those at the rear are for the open heating elements which have clay members in grooves of which the heating coils are placed, and from which the heat is directed upwardly against the bottom of th"cooli"ing vessels.- The two front openings receive plates 14-, 14 of the heating units instead-of grates. The plate at the right has adepressed surface' and the plate at the left is plain, and both can be used as griddl'esor serve as heating plates for the vessel placed thereon.

The front wall of the cover memberis provided with openings for the insertio'n'or removal of waffle irons anda toaster, into and away from the front heating units, the toaster being located at the right. hand heating' unit, and the waffle iron being used at the left hand heating unit as shown respectively at 15. 16,'Fis. 1,'2' and 5. i I The heating units at the front marlted' 11 and 11 are of an enclosed type inft ha't they do not direct heat up immediately against the vessel-asdo the rear heating units above lnr'itip nd; and'it will be seeii from Fig. 5 showing-(inc of these front heating units in section that the plates-14, 14 above mentiond are prom-ea by the upper eiteiisioi'ls oft he casings ofthse forward heating units which extensions project upwardly through closing casing which may be made of upper and lower sections secured together; the bottom' of the-casing resting on'- thejt'o'p plate or portion of theina-in body 1. These ca's' ings are' of rectangular form at their main body portions 'andthe'cilcular plate portions 14, 14: form" extensi'ons'oftheupper section of the main body. The" main at the front is provided; with an opening 'to' match the o ening ih'"'the fr'ont 'wallfof'tlie cover member for the? placin pr rel'noval of" the toaster and waffle ironsi \Vithinthej'ca sing of the heating units 11 11 heating or resistance coils 17 are located supplied with current *t-h rough suitable circuit connections; and there are two series of these coils between which the waflie ifons'gand" toaster are 'received. Each Of these heating" units is ro vided with spring contacts as a t 1's, which engage electric contactst mounted on the top plate of the main body Lfof which purpose spring members 19'arer'n'o'i-lnte'd in insulating blocks 19 secured to the under side of the top plate 1- whi'clrisprovidedwithan opening through" which the spring contact members 19 are: exposed to receive the depending' spring -contacts 18 of the heating elements. All'the'heatihg units or elements, i. e. both the front and rear sets are provided with these contacts to engage theconipani0n s'ocketed contacts-of the topl. The rear heatin ni-tsflm like those above described ha e'jacketsor casings as at 10? but instead of being closed at the top by'ex'tending the sheet metalyshell' otthecasing they hold the members shown at 20 consisting of plates of non-conducting material such as clay, spirally grooved on their upper surfaces, in which grooves the heating-or resistance coils are placed. v I

The clay plate rests on ashoulder 21; at the upper part of the side wall of the casing of the heating element where it is retained. by the clips forming extensions of said side wall as at 22. These rearheating units or elements li'ke those above-deserihed'are p'rovided with depending electrical contacts which remo'vably engage other contactscarried by the top plate 1 ofthe mai'n'bod y. All the heating units are protected against drafts and loss of heat by the movable covet 4 which encloses them. 7

This cover member 4 provides a dead air spa'ce in which the heating eiemeats abwe described are located, and by which the-heat is conserved, the dead air serving as a heat insulation. This feature is also carried out in connection with the heating elements themselves. For this purpose and referring now to the frontiectnngular heating ele- 11161115 11', or 11, Figs. 12 and 13', each is provided with an inner member composed of a bottom plate port-ion 11 and sides 11 which have guide ways 11 extending from front to' rcar of the member for receiving the \i'aflle irons 'or' the toaster. The sides 11- have laterally extending flanges 11 at their upper ends which lie against the under s'idt. or the upper alulnix'n'nn section of the outer casing oi? the'mcnihcr 11, or 11 and thcscflangesare clamped to the said upper section by nuts 1-1 on the bolts 11, which hold together the upper and lower outer casing et-cia-mwf the heating element. This inne'r' tra'nit incihb'ei is therefore sus ticnded frtim the said top section of the casing of the heating element 11' or 11*, as the case niiili be;-and1t*is in spaced apart relation to the-side of said casing and also in like relation tothebott'oni and back of said casing, thus lea'ving dead air spaces along the bottom hiick and sides, but no deadair space is left at tfllc't'opf Where the heat is to' be suppliedtqheat the upper platef portion 14 or 14 This" inner frame member suspended \uit'liir'i the casing as just desciibed forms the support: for the heating coils and their immediate sup er-tiin means 'Ehisgfor the tipp e r coil consists ofcross bars of sheet nitiil Figs; "12, l3 'a'nd 13,- bent to form double-walls as at 11 and having} t'g'mg-t'i'es 1 1 bent? to embrace'the edges of sheet metal mips- 11' which stend tel-ass the inner fra'nie' and through openings in the flanges ll fthfiredf. .1 For the l'o'uefcoil the cross hiirs 11" similar to the bars 11"" here their alternate tongues clinched t-h'iotig'l'i' open-rugs in t'he lihtt'oni' plate" 11" of the inner fran'ie' member. Fig; 13*.

' This inner frame member has secured (hm-cm the electric terminals 18 through whielheurrentissuppliedto the coils: These tcrniina'ls yhi'cl'r are in the form of strips with doubled hack and portions forming s 'u'iny; members to engage the socket con-' (acts on the top plate of the body 1 pass through o 'ieninp s in the bottom of the ca. ingf of the heating elements and in ordci' to prevent the escape of heat here. either frmn the heating element calsi'ng or from Within the body of the store: where the oven is ca tcdsthe bottom of the heating clement. is provided with ahextensior'i or circular" (we hossrnent11' surrounding-the elc'tri'c contrets' and restingupon 'theflztt surface o'f the body" 1; This not only provides a. close 'fi't and asealing against the escape-0:" hej'ztt. but

itelevates the major portion of the hottoiii' ot t lie-casing' of the heating element 11 19 above the top" plate of the bbd'y' 1 and firo'' rides a dead air space which prevents loss of heat by conduction; T his feature is carried out also in connection with the cylindrica'l heatingelements 10' the bottoms of which are provided witlr ribs to'contact with the top of the stove, said ribs surrounding the openings in the top plate at which the electric contacts are located.

The top sections-0t the casings 11'; 11" are made of aluminum which will-quickly trans mit the heat to the articles being cooked on top. Access is gained to the-*lieating units by lifting up the cover inenilier for which purpose the toaster andwvafile ironsm'ust' be rem'o'i 'ed, leaving, ho\\"e\ 'er,--the heating units 11, 11 in place, whereupon any heating unitcan he lifted out of place or canbe' replace'di By simply lifting the heating units out of place-the top plate can be cl'e'aned'.=

The clay member of the'hsating unit'lO'i-s imperforute so't ha't all the l eet is ir plied directly against the bottoni of the; vessel? Act the i'ro'nt heatizig units cooking can be done on th'e" top plates of ithe casing-s ot jackets 1 1 11 ofthe se' elements at thefsame time wfifiles are bei'ng'coolted" awhile-wast hip; is carried on, =it/ being 'noted that the same heating coils" Witfhi the said casings which ,do' the toasting or the-cooking also heat the top plates 14.3145 which extend up enough the" openings in t-he cover memtier 4. The top plate 14: which serves as a griddle has a rib around its edge as-at'23; Fig 12;

The cover member emay-be held i-nfits raised posit-ion 'by iii-l1$"24:lii\7b%'d" tfi t0 tluvdepending sides '5' of the covert: These firms are pioViddfiith-hoks =24 which engage 'slots OHOpeniiigSiIithe top p'late ofthe n'iain-hody 1 by which said co'vfi will he lltlfltlOWIl'. j F

W'he'n, however; the arin'sfare turned on their pivots by grasping and turning the finger {)lecesQ L'" on the outside of 'the cover and attzicli'e'd to the 'pi'vots' of the arms, said arms can he manipnlated to release the cat'ches of h'o0lts24: from engagement with the top p'lii't'c 1' and the arms can Be set in iosition" to support the cover-' in elevut'ed position. the-end poi-6011924 of the arms havin; been brought to bear on the-top plate 1.

The front body panel and theback plate 26 of the stove are of. sheet. metal like the main body and like-the cover-member '1' and the casings of the heating elements ahoie" described aucl alsol ilie said pa ts they are stamped to shape. The front panel or' stampin is provided with an opening to fe csgi'cc the oven 28 within the minefithe stote, the; (floor of which is indicated gcfieie'uyat 2?. The beckpuifeathefr'ent mine! and the min: 5011* 1' the held wgether' hi rods mend screws 30. I

A head 31 i3 inserted betfilen tli meeting edge; of the main body P83311 the Til , meetin edges of the members and hides any raw edges of the white cnamelled parts but alsoserves to strengthen the joint by reason of the reinforcement afforded against in ward displacement.

. Each bead member is made in one continuous piece or strip. This strip has its inner flange cut away at 32*, Fig. 6, at the point where the strip is carried around the corner of the body. At'this point the wall of the body 1 is curved as shown atlf, Fig.

: 5, adding strength to the structure as well as t-.'its finished appearance. This bead strip is shaped to the form-0f an open frame corresponding to the cross sectional shape of the body 1 and in assembling the parts it is slipped onto the edge of the body, then the back or front plate of the body is slipped into its place in the bead and thereafter the tie rods 29 areplaced in position, and all parts arev drawn together.

NVithin the main body 1 the oven member 28 is supported in spaced apart relation to the top, bottom, back and sides thereof. This oven member is composed of inner and outer. sheet metal walls with a dead air space between them at the top, sides, back and bottom of the oven. There is a Venti lator at d in the front .door for ventilating the space within the oven.

The rear wall of theoven is formed of spaced apart sheet metal members 28, 28*, Figs. 6 and 6 with a dead air space for heat insulation. The back plate 28 is shouldercd at 28 and fianged at 28 to bear against the inner side of the main walls of the oven and these joints are welded. The back plate 28" is flanged at 28 to embrace the outer wall of the oven, but need not be welded at this point because this back plate is mechanically held as will be described. The oven is insulated against loss of heat both by the dead air space between its walls and also by the dead air space between the oven body and the wall 1 of the main body of the stove.

This feature of insulation by dead air is carried out as above described in connection with the upper burners, both by reason of the casings enclosing the heating elements proper and becau Of the use of the cover member 4,

The even is supported at its rear end in spaced apart relation to the back of the main body by two screws or bolts 1'. This leay'es a dead air space for insulation against the escape of heat at the rear of the stove. The bolts have each a rectangular portion, with a spacer 1 between the shoulder thereof and the inner side of the back wall 28" of the oven. Nuts 1 on bolts 1 hold back wall .28 against spacer 1 and there is a spacer 1 between nuts 1 and the hollow nut or thimble, which is threaded on the bolt and forms the connection between it and the rear wall ol= the body 1.

The oven is supported at its front end in the panel member 25 for which purpose said panel or frontanemher is stamped to provide a seat at 25 of curved form to receive the rounded surface of the turned bead or edge 28 on the member 28 whiclrforms the front end or portion-ofthe oven proper. This bead is formed on a flange projecting from the said .member 28 ,This member 28 is secured to .the walls ofthe oven by-its bead 28 and by a weld at 28 audit is curved to provide a'seat for the door. This door27 is hinged at its lower edge to the front body panel atv and it-is composed of a front portion, a panel 27 ".,a.back -34 curved to fit the curved seat at the front of the oven, and an intermediate member 34". These members of.the door. are held together by their interlockingflanges at 34 and by male and female. screws 34? which connect the door members 27%, 27?, 34, and 34", Fig. 6, and make arigid door structure. These screws are located near the corners of the door structure. The innerheads of these screws are countersunk in recesses formed in the plane or flange-portions of-the members 34, 34", where these contact and make a double thickness of material. The part 28 of the oven and the inner plate 34 of the door are stamped out in thesame die at the same time so that they will fit perfectly where they contact with each other.

A door of the construction described provides two dead air spaces, one on each side of the central plate or member 34 and these spaces provide heat insulation at these points.

By my construction the insulation of the oven against the loss of heat is carried out to a maximum degree. The features entering into this is the double wall construction of the oven itself, with a dead air space hetweenits walls, also the dead air space be-- tween the oven and the wall of the body, and the further dead air space between the top of the body and the cover member 4, which with the dead air space over the :top of the oven provides, together with the dead air space between the top walls of the oven itself, a triple dead air space against the loss of heat upwardly from he oven, and at the plaeefa'nd effect alignment of insulator block oven is provided, 'as'will be described.

' metal wall of oven.

front the double-dead airspaces of the door provide for heat insulation here. The oven is removable and can be drawn out or pushed into place as one body.

When pushed into the main body, it engages inclines on terminal block -.)1 or skids 36 which raise it to the proper level properly spaced from the bottom of the main body, and also properly positioned to receive hol low'nut or thim'ble'for holding the oven in 49 between rear ends of oven and blocks 5U, carried by main body, said blocks 50 supporting contacts whereby current will be supplied 'to theheating coils with which The front portion of the oven may be said to have a self adjusting action. The opening in the panel'member 25 and seat 25; being slightly larger than the bead and outer sheet This construction is therefore one in which the front end of the oven whileheld in position to receive the door within its recess will have a slight floating or accommodating action to make' it conform to any slight misalignment with the part ofthe door which enters its recess and makes a tight oint. i'llhe door when lowered to substantially a horizontal position to gain. access to the oven is' 'h eldin' this position by side rods 37, which areipivotally'connected tothe door by semis'pl'ieri'ca'l i n'ei'nb'ers 38 fitting in"ree esses' in the door'frzirne, said rods having springs 39 Co nne'c t'ed'totheir inner ends and to the'rear wall of the main ofthe stove by which thef'doortis under stress tending to balance or elose' it. 1' hese' 'rods and Isp'rin gs'dlie in the space between 'the' sides' of the oven andthe sides ofthe main body. The position of these rod's is indicated in Figs. 3. '4 and 6 in dott'edlines and in Fig. 6 I

The sockets in'which the l'ieinispheric'al pivots 38 work'are formed in the double thicknessof metal provided by the contacting flanges of theniembers 34",34". vThere is a clip 38* at each v of i the hemispherical front pivot hearings'HS of the rods 37 which (lip engages the back or square shoulder on the hemispherical members. The lowered or horizontal position thedoor is determined by the plate 37" on the rod 37 coming against the inner side of the 'front "wall and acting as a stop. .This "platejha's the spring 39 connected thereto.

In orderto take out" the oven'it is necessary to drop the front door down further than normal horizontal or lowered position,

and for this purposethe'rods which's'upport lowered far enough to not obstruct the oven in its removal.

The door is provided with a handle by which it may be manipulated.

This handle as well as its keeper 39 is made of sheet metal stamped up into shape. The handle comprises a cross bar 39'" of channel form with arms 39 extending forward. Between the front ends of'these the handle proper or grip 39 is secured. The crossbar presents end walls which receive the pivots 39 which are supported by bracket arms or cars 39% These have base portions 39 on the inner side of the front wall of the stove door to which they are screwed, the said arms passing through slots in the front wall.

The cross bar of the handle has an integral extension 39 bent upwardly and then downwardly with a rounded upper-portion to engage under a-lip 39 as'tam'ped froin'a part of the keeper 39 which is secured to the front member of the stove.

The right and left sides of the main body of the stove are symmetrical relative to each other in that each has a circular recess 40 near its rear upper corner, and along the upper margin of each side there is an elongated recess 41. In the circular recess at one of the sides there is locatedarelayelectric switch and at the other circular recess there is located .a timing device or clock which will control:

the current supply automatically according to the time it is desired that the oven heating elements are to be put in operation and the time they are to be put out. The'clock or timing mechanism may be placed in either of the recesses and the switch in the other and the stove is thus capable'of being used as a right hand or as a left hand'stove in the sense that the clock may be placed either at the right or left to suit the position that the stove must assume in relation to the room in which it is placed.

in other words the clock or timer and the relay switch are interchangeable-in position.

Referring to the' cross sectional view Fig. 5:

The oven is provided with upper and lower heaters 42, 43. Also side racks 44' for receiving the cooking utensils at different heights." The heaters may be of the form shown in Figs. 8, 9, l0 and 11, consisting of frai'nes' 4:") on which are mounted channel bars in which are held insulators 47 through which the resistance coils 48 are threaded. These heating coils are arranged in two sets. one set is located between the terminal contacts a. I). and'the other set is located between the terminals 0, I). The first set includes the groups of turns of thecoil a a a a, the groups a and a? being contion of the coil as shown at of, the groups 

